DTC Fault Trigger Conditions
DTC | Description | Fault Trigger Conditions |
|---|---|---|
B127A:12 Global Window Control: Circuit Short To Battery | This DTC sets when the Body Control Module B (BCM-B) detects a short to voltage on the global open circuit. | |
B127A:14 Global Window Control: Circuit Short To Ground or Open | This DTC sets when the Body Control Module B (BCM-B) detects an open or short to ground on the global open circuit. |
Possible Causes
Global open not enabled in the message center RKE transmitter Door window regulator motor not initialized Wiring, terminals or connectors Body Control Module B (BCM-B)
PINPOINT TEST I : THE GLOBAL OPEN FUNCTION IS INOPERATIVE
I1 CHECK FOR BODY CONTROL MODULE B (BCM-B) DIAGNOSTIC TROUBLE CODES (DTCS)
Ignition ON. Using a diagnostic scan tool, perform Body Control Module B (BCM-B) self-test.
Is Body Control Module B (BCM-B) DTC B127A:12 or B127A:14 present?
Yes | For B127A:12, GO to I2 For B127A:14, GO to I7 |
|---|---|
No | GO to I13 |
I2 CHECK THE GLOBAL OPEN CIRCUIT FOR A SHORT TO VOLTAGE
Ignition OFF. Disconnect: Body Control Module B (BCM-B) C4368A. Ignition ON.
NOTE: The LH and RH side window(s) each have their own global open circuits, however both of these circuits are tied together within the Body Control Module B (BCM-B). Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C4368A-10 (LH window(s)) | Ground | |
C4368A-22 (RH window(s)) | Ground |
Is any voltage present?
Yes | If voltage was present on the LH window circuit, GO to I3 If voltage was present on the RH window circuit, GO to I4 |
|---|---|
No | GO to I17 |
I3 CHECK THE GLOBAL OPEN CIRCUIT FOR A SHORT TO VOLTAGE WITH THE LH (LEFT-HAND) FRONT WINDOW MOTOR DISCONNECTED
Ignition OFF. Disconnect: Driver Door Window Regulator Motor C518. Ignition ON. Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C4368A-10 | Ground |
Is any voltage present?
Yes | For coupe, REPAIR the circuit. For convertible, GO to I5 |
|---|---|
No | INSTALL a new driver door window regulator motor. REFER to: Front Door Window Regulator Motor (501-11 Glass, Frames and Mechanisms, Removal and Installation). |
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